Power take-off device for tractors



i 1,6 ,27 JuneZl, 1927.4 P. RNMER ET AL 33 3 POWER TAKE-OFF DEVICE FOR TRACTRS Filed March 31. 1924 2 Sheets-Sheet 1 "'llllllllll/l f2; 19a/5 @Mah-wwwa; Lm"

1 June 21 927 P. RAIMER E1 Al.

POWER TAKE-OFF DEVICE FOR TRACTORS F'i'led March s1. 1924 2 sheets-sheet 2 Patented J une 21, 1927.

UNITED STA TE Sg PATENT oi-"Fic E. f

PHILIP nAIivrER, .IosEPH B. RAINER, AND @Dv/'Anna noLFs, or MAPLE HEIGHTS,

f Y Y oHIo. l

, 1 POWER iAIiE-OEFV DEVICE Pon iinAc'rons.'

l Appiiation flied Mariah 31, i924. seriai Ng. fioaio. y

Al\ lumerous tractors nowr in use have a re-l movable Ypulleyv attachment, posi tivelyfgeared with the engine yand projecting beyond one side of the tractor, for receiving a belt' to o Vpermit operation vof machinery by the tractor engine. Usually the driven shaft on which: the pulleyis mounted is geared to the engine drivesliaft betweenthe engine,land the transmission `mechanism, wherefore the pulley is constantly operated in' one, direction. so long as the engine is incperation. It is often desirable, how ver, either to stop the pulley without stopping the engine, and also to reverse the direction of rotation of the'pulley without stopping the engine. y

One ofthe vobjects of our invention thereforeris the provisiorrof mechanism wl'i'ich may be employed for selectively controlling the operation of a driven shaft yfrom a constantly rotating drive shaft. ln this Connection our-invention contemplates the provi-k sion of-n'iechanisin which is'especiallyadapted for use on tractors, and ismoreover directed toward the provision of a .selective 35 control device whichhmay be housed in a compact casing, to permit adaptation to the side ofl a ltractor frame.' l i Y The? means for carrying outY our invention will hereinafter loe fully set forth in thefol- Si? lowing description which pertainstolthe accompanying drawings, while the essential characteristics. will be s ummarized. in vthe claims. -f i l In the drawings, Figl 1 is across-section through aportion Aofa tractor frameV showing al driving and-driven shaft together with "a: "pulley attachmentzandillustrating our "invention associatedV therewith; AFig. ,2 is a sectiontaken on the line 2 2 i-ngFigfl'; Fig. 3' isafsection taken on the 'line 3%3 in Fig.' lig-Fig. 4l is aplan-fgview showing a p portion of'a tractorandillustratingthepulley attachment on the side ofthetractor; and Fig; 5 'is a side elevationofithemechanism 'shownin Fig.; 1.5 l Our invention isf-'welladapteduforiise in selectively controlling-the operationcf va driven .shaft from a constantlyjoperating drive shaft.;` In the preferred embodiment, 5G. however, we have illustrated itriii connection with a tractor, thegfraine of whic'liis indicated ingenerall at 10. This traint-ih supports adrivi'ng shaft 11 which is arranged to-be positively driven from tlietractor 26.11-

55- gine indicated at .As shown thedrivingYl shaft projects beyond'the sideV` of ,the

frame and'l into housing 12 which may be attached 'to `the fraineib'y securing mem-A bers 13. Journalle'd within the housing, as

at 11,1, we have shown a driven shaft "1.5i

which PfQleCtSf-beYOIlCl the housiingTIA all'dis provided at the outer vend thereof with a' pulley wheel. 16.

l Our invention is 1 concerned with mecha-` nisnk for 'selectively controlling vthe operation of lthe drivenY shaftwhile the driving' shaftisl lconstantly rotating. i To' this endv we employe bevel gear 17 which' is 4'rigidly' inountedon the shaft 11, outside theframe 10, and'iiear the endof the shaft. i le have also shown a similarfbevel gear"18`which kis rigidlyinounted onaushajft 15 'and near rthe end thereof. A spider 19is shown ,disposed between thel gears 17 and 18a-nd. may be' supported partially on eachshaft.'V W'er have shown the spider as having arms 2O entending radially therefrom, whicharms support pinions2'1,`which.l mesh with thev gearsf'li."

and 18 resp"ectively.nv Awdrum 22jjis disposed within jthe housing jand'iswadapted to be rigidly l'connected to each arm 2Q,-Y as' se- .ullng :membersegf f r The Y mehenisin i heretofore negated-j is adapted to permit constant @perm-1on1 of the drive shaft Awithout.effecting rotation of Vthe driven shaft. vFor example, if alo'adis placed on the pulley 16 so as to overcome p friction' between. the operatingparts :ofthe controlv mechanism,v 'then' as the gear v17'is rotated the pinions 211are rota-ted., Since the loadfon thepulley wheel issufiiciently, great .to prevent rotation ofthe gear 18,' andfsin'ce the druml V22 isv rigid with each post `r20,2then ysuch 'drum'v caused'to' 'rotate lwhile thep'in'- Vvions revolve about ,the axisk ofthe shaft. ,In

other` word'sfthev mechanism 'function's' Y in a manner 4.similar ,tov a" differential gear y mech- 4anism'j .wherein one i driven shaft; ,isj'maintained stati' nary, l`theother. isz'permit- To eauseaotu @een Ofniepuiiey when ie,

30 in lthe housing in such position as to be accessible for actuation. When the arm 29 v is actuated to set the brake, then rotation of the drum is stopped, Wherefore the pinions@ cause the gear 18 to rotate in a direction opposite to that of the gear 17. AThus if the gear 17 is rotating and the brake is not set,

then the drum 22 rotates Without rotating the pulley 16. On the other hand if the drum is locked against rotation, by setting the brake on the outer surface of the drum, then the gear 18 is caused to rotate in a direction op-. posite to the direction of rotation of the gear 17.

To cause the gear 18 to rotate in the same direction as the gear 17, and thereby to rotate the pulley in the same direction as the drive shaft 11, We provide selectively operable mechanism for connecting the drum 22 With the gear 18, Wherefore the gear 17, spider 19, drum 22, and gear 18 may be locked together and rotated as a unit. The preferred mechanism for accomplishing this embodies a friction connection, as illustrated by a plurality of spaced shoes 31, which are pivotally mounted at 32 on the back of the gear'18, and are provided with facings 33 which are adapted to engage the inner surface of the drum.

To actuate the shoes 31 and thereby to effect a driving connection between the drum and the gear 18, We have shown each shoeas having a tapered lug 35 adjacent the free end thereof. These lugs are adapted to be simultaneously engaged by a conical member 36, which is rotatable With the gear 18. Ve prefer toconnect the memberf36 With the gear 18 by pins 41 each of which is rigidly mounted in the gear and is slidably mounted in an lear 38 on the member. The conical member and the tapered portions 35 of the shoes therefore, coact to provide a clutch, which when actuated forces the lining 33 into engagement With the inner surface of the drum. The clutch member 36 is normally.main tained out of engagement with the shoes by spaced coil springs 37, .each havingone end thereof engaging the back of the gear 18 and the other end thereof engaging an ear 38;

The shoes are normally prevented from being forced into engagement With the drum by centrifugal force, preferably by a split band 39 which extends around the lugs and is yieldably connected by a spring 40.

To move the conical member 36 against the force of the springs 37 Iso. as to set the shoes against the drum We have shown a shipper lever 45 Which extends throu h an opening 46 in the housing and is loose y mounted on the shaft 15. The hubof thelever may have an inclined peripheral surface 47 Which is adapted to engagea block 48 and to function as a cam for urging the cone 36 along the shaft. The pitch of the cam surface 47 is such that a slight oscillatory movementV of vthe housing, a reversing mechanism the shipper lever is sufficient to throu7 the cone inwardly against the force of the springs 37.

Assuming that the shaft 11 is constantly rotating in one direction and that there is sufficient load on the pulley Wheel 16 to overcome the friction of the moving parts, then if both outer andinner brakes on the drum 22 are released, thev spider 19 Will rotate, and the pinions 21 carried thereby vvill also, rotate on their respective aXes Without imparting motion to the gear 18. Accordingly When both brakes are released the shaft 11 may rotate Without imparting rotation to the shaft 15. To rotate the pulley Wheel in a direction opposite to the direction of rota@ tion of the shaft 11, the brake controlled by the arm 29 is set. This holds the spider 19 in stationary position Wherefore the pinions 21 cause the gear 18 to rotate ina .direction opposite to that of the gear 17 To cause the pulley Wheel to rotate in the same direction as the Vshaft 11, the brake controlled by the arm 29 is lreleased and that controlled by the shipper lever 45 is set. This locks the gear 18, drum 22, spider 19 and gear 17 as a unit Wherefore the shaft 15 is caused to rotate in the same direction as the shaft 11.

An advantage of a device made in accordance vwith our invention is the adaptability for use With existing tractors and the ease by Which the operation of the pulley Wheel may be controlled from a constantly rotating drive shaft. A further advantage of our invention is the compact arrangement of the control mechanism which permits the installation thereof in a small space.

Having thus described our invention, We claim: f

1. The combination with a tractor frame having an vopening therein, of a housing having a cylindrical interior removably secured to the frame adjacent the opening, a driving shaft, an aligned driven shaftmounted in connecting the driving and driven shafts andcomprising gearsY on each of them, an axially rotatable member between the gears carry- Y ing pinions meshing vvith them, a sleeve carrying said rotatable membery journalledy in the cylindrical interior of the housing,and a ybrake band operatingin a recess in the sleeve. j- Y 2. The combination withv a tractor frame having an opening therein, ahousing secured to the frame opposite the opening, a driving shaft projecting into the housing, an aligned driven shaft in the housing projecting beyond the same, saidl housing having a cylindrical interior, a sleeve journalled therein, a ,spider connected With the sleeve carrying pinions, bevel gears ,on fthek driving an'd driven shafts, respectively, With which such pinions mesh, a brake band coacting with a reduced portion of said sleeve, and a clutchl adapted to lock the driven shaft to said sleeve. Y

3. In combination with a tractor frame having an opening therein, a housing secured to the frame opposite the opening, a driving shaft projecting into the housing, and en aligned driving shaft in the housing projecting beyond the sa1ne,sa id housing heving a cylindrical interior, a sleeve ouinailed therein, 2L spider connected With the sleeve and carrying pinions, bevel' gears on the driving and driven gear-s respectivelyv With Which said pinions mesh, said sleeve having a reduced portion at one end forming a resleeve to lock 'the sleeve to the housing, rand V:Liever extending through the Wall of the housing and having a connection with each end of the brake band whereby the brake band supports the lever.

In testimony whereof We hereunto a'lix A our signaturesthis 19th dey of March, 1924. Y PHILIP RAIMER.

` yJOSEPH' B. RAIMER. EDWARD A. ROLFS. 

